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CH102 In-Lab 07 Measuring Enthalpy Changes

CH102 In-Lab 07 Measuring Enthalpy Changes - CH102 In-Lab...

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CH102 In-Lab 07 Measuring Enthalpy Changes http://www.webassign.net/[email protected]/student.pl?e=200511... 1 of 5 11/15/2005 9:56 PM WebAssign.net Tuesday, November 15, 2005 09:56 PM EST Logged in as [email protected] Logout Home | My Assignments | Grades | Communication | Calendar Guide | Help | My Options Home > My Assignments > CH102 In-Lab 07 Measuring Enthalpy Changes (In-Lab) COLLINS RYAN ALAN CH 102, section 051, Fall 2005 Instructor: robert wilcox TA North Carolina State University About this Assignment Due: Wednesday, October 19, 2005 11:00 PM EDT Current Score: 50 out of 50 Question Score Submissions Made: 1 out of 3 pts 1 -/0 2 -/0 3 -/1 4 -/0 5 -/0 6 -/1 7 -/1.25 8 -/1.25 9 -/1.25 10 -/1.25 11 -/1.25 12 -/1.25 13 -/1.25 View: All Responses Notes 1. Part A: Heat of Solution- CaCl 2 and NH 4 NO 3 Transcribe your results from Data Table A. Data Table A. Heat of Solution Initial temperature of water 22.6 [22.6] o C Temperature of solution after addition of CaCl 2 32.1 [32.1] o C T 1A (T final - T initial ) for dissolution of CaCl 2 9.5 [9.5] o C Initial temperature of water 21.1 [21.1] o C Temperature of solution after addition of NH 4 NO 3 15 [15] o C T 2A (T final - T initial ) for dissolution of NH 4 NO 3 -6.1 [-6.1] o C Question 1a. The dissolution of CaCl 2 gave off [ gave off ] heat. Question 1b. The process was exothermic [ exothermic ] . Question 1c. Its entropy change can't be determined [ change can't be determined ] .
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